Creation of user in the runtime.

Added tini

Dockerfile

@@ -25,16 +25,15 @@ RUN mage build:clean && \
 # because of this, the container would not start when I compiled the image without cgo.
 FROM alpine:3.16 AS runner
 LABEL maintainer="maintainers@vikunja.io"
-WORKDIR /app/vikunja/
+WORKDIR /app/vikunja
+ENTRYPOINT [ "/sbin/tini", "-g", "--", "/entrypoint.sh" ]
 
-ENTRYPOINT [ "/app/vikunja/vikunja" ]
 ENV VIKUNJA_SERVICE_ROOTPATH=/app/vikunja/
+ENV VIKUNJA_PUID 1000
+ENV VIKUNJA_PGID 1000
 
-RUN apk --update --no-cache add tzdata && \
-    addgroup -g 1000 vikunja && \
-    adduser -s /bin/sh -D -G vikunja -u 1000 vikunja -h /app/vikunja -H && \
-    mkdir files && \
-    chown vikunja:vikunja files
+RUN apk --update --no-cache add tzdata tini
+COPY docker/entrypoint.sh /entrypoint.sh
+RUN chmod 0755 /entrypoint.sh && mkdir files
 
-COPY --from=builder --chown=vikunja:vikunja /build/vikunja-* vikunja
-USER vikunja
+COPY --from=builder /build/vikunja-* vikunja

docker/entrypoint.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env sh
+set -e
+
+if [ -n "$VIKUNJA_PUID" ] && [ "$VIKUNJA_PUID" -ne 0 ] && \
+   [ -n "$VIKUNJA_PGID" ] && [ "$VIKUNJA_PGID" -ne 0 ] ; then
+  echo "info: creating the new user vikunja with $VIKUNJA_PUID:$VIKUNJA_PGID"
+  addgroup -g "$VIKUNJA_PGID" vikunja
+  adduser -s /bin/sh -D -G vikunja -u "$VIKUNJA_PUID" vikunja -h /app/vikunja -H
+  chown -R vikunja:vikunja ./
+  su -pc /app/vikunja/vikunja - vikunja "$@"
+else
+  echo "info: creation of non-root user is skipped"
+  exec /app/vikunja/vikunja "$@"
+fi
+